Metallic cross-arm for poles.



G. G. BTTE.

METALLIC GROSS ARM FOR POLES.

APPLIOATION FILED MAYBE, 1911.

Patented May 28, 1912.

UNITED STATES PATENT OFFICE.

CHARLES G. ETTE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO ETTE INVESTMENT COM- PANY, OF ST. LOUIS, MISSOURI, A. CORPORATION OF MISSOURI.

METALLIC CROSS-ARM FOR POLES.

To all whom it may concern Be it known that 1, CHARLES Gr. E'rrn, a citizen of the United States, residing at- St. Louis, Missouri, have invented a certain new and useful Improvement in Metallic Cross-Arms for Poles, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to cross-arms such as are used on poles for carrying insulators.

One object of my invention is to provide a short cross-arm having means for supporting a large number of insulators at the proper distance from each other.

Another object is to provide an inexpensive insulator-supporting means consisting of a channel-shaped metallic cross-arm and insulator pins mounted upon said cross-arm and connected thereto in a novel manner.

Another object is to provide an insulatorsupporting means consisting of a channelshaped metallic cross-arm, and insulator pins which project upwardly and clownwardly from said cross-arm, the pins which project from one side of the cross-arm being provided with laterally projecting arms or extensions which receive screw-threaded portions on the pins that project from the other side of the cross-arm. And still another object of my invention is to provide an insulator-supporting means consisting of a cross-arm, a set of insulator pins projecting upwardly from said cross-arm, and a set of insulator pins projecting downwardly from the cross-arm and arranged in staggered relation to the insulator pins on the upper side of the cross-arm.

Other objects and desirable features of my invention will be hereinafter pointed out.

Figure 1 of the drawings is a front elevational view of a pole cross-arm constructed in accordance with my invention; Fig. 1 and Fig. 1 are detail views illustrating different ways of connecting the upper insulator pins to the cross-arm, Fig. 2 is a top plan view of the cross-arm shown in Fig. 1'; Fig. 3 is an enlarged sectional view taken on the line 33 of Fig. 1, looking in the direction indicated by the arrow; and Fig. 4.- is a front elevational viewof a structure embodying my invention in which the insu- I Specification of Letters Patent.

Application filed May 25, 1911.

Patented May 28,1912.

Serial No. 629,349.

lators on the lower pins are arranged directly under the upper pins.

Referring to Fig. 1 of the drawings which illustrates one form of my invention, B designates a pole, and A designates a channel shaped metallic cross-arm that is connected to said pole. Said cross-arm is provided with one set of insulator pins 1 that project upwardly from the cross-arm and a separate set of insulator pins 2 that project downwardly from the cross-arm, the set of insulator pins 2 on the under side of the crossarm being arranged intermediate the pins 1 on the upper side of the cross-arm or in staggered relation to said upper pins.

By arranging the insulator pins in the manner above described I am able to mount a large number of insulator pins on a comparatively short cross-arm and still maintain the required spacing or distance of ten or twelve inches between the insulators, thereby producing an eflicient, compact and light-weight insulator-supporting means.

Each of the insulator pins 1 on the upper side of the cross-arm consists of a straight iron rod that passes through openings in the horizontal top and bottom flanges A of the cross-arm, said rod being provided at its upper end with a screw-threaded portion on which an insulator is mounted and at its lower end with a screw-threaded portion 1 which cooperates with the means hereinafter described that retains the pin in position. Each of the pins 2 on the under side of the cross-arm consists of a rod of iron bent laterally and upwardly at its lower end to form an upwardly projecting arm 2 on which an insulator is mounted and bent laterally, in the opposite direction, at its upper end to form an arm or extension 2 having a flattened portion in which a screwthreaded opening is formed to receive the screw-threaded portion 1* of the upper insulator pin 1 with which it cooperates, said pin 2 passing through the bottom flange A of the cross-arm and the laterally projecting extension 2 on the upper end of said pin lying upon the upper side of said flange. In the structure shown in Fig. 1 the crossarm is provided with ten insulator pins, six pins being arranged on the upper side of the cross-arm and four on the under side of the cross-arm. The four intermediate pins on the upper side of the cross-arm cooperate I with and are connected to the pins on the -under side of the cross-arm by the screwthreaded portions 1 of the upper pins 1 which enter the screw-threaded openings in the lateral extensions or arms 2 011' the lower pins, and, if desired, nuts 3 can be mounted on the screw-threaded portions 1 of the upper pins, below the bottom flange A of the cross-arm so as to securely connect both pins to the cross-arm and prevent them from moving upwardly relatively to the cross-arm. The end pins 1 on the upper side of the cross-arm are retained in position by means of two nuts 4 which are arranged on the screw-threaded portions 1 of said pins on opposite sides of the bottom flange A of the cross-arm, but it will, of course, be understood that said pins could be retained in position in various other ways, for example, by dispensing with the lower nut 1 and upsetting or bending the lower end of the pin laterally, as shown in Fig. 1 or by providing one flange A of the crossarm with a screw-threaded opening for receiving the screw-threaded portion 1 of the pin and then bending the end of the pin lat erally, as shown in Fig. 1

A structure of the character shown in Fig. 1 can be manufactured at a low cost because the insulator pins are formed from straight bars or rods of iron and they are not provided with integral flanges, wings or collars that cooperate with the cross-arm to limit the downward movement of the pins. In assembling the structure the arms 2 of the lower pins 2 are first slipped through the openings in the bottom flange A of the crossarm before the insulators have been mounted on said arms and the pins are drawn downwardly until the lateral extensions 2* on the upper end thereof rest upon the bottom flange of the cross arm. Thereafter, the upper pins 1 are inserted through the openings in the top flange A of the cross arm, and the screw-threaded portions 1 of said pins are screwed into the openings provided for same in the flat portions of the lateral extensions 2 on the lower pins, the nuts 3 being screwed onto the portions 1 of the pins 1 which project through the bot-- tom flange of the cross-arm so as to securely lock the pins in position.

If desired, the pins on the under side of the cross-arm can be so formed that the insulators thereon will lie directly under the upper pins. I have illustrated such a structure in Fig. 4, the reference character 20 designating one of the lower pins which is provided with an insulator-supporting arm 20 that projects laterally from the pin in the same direction as the lateral extension 20 on the upper end of the pin which is connected to the pin 10 arranged on the upper side of the cross-arm.

WVhile I have herein shown the cross-arm as being provided with insulator pins that project upwardly and downwardly therefrom, it will, of course, be understood that certain features of my invention, such, for example, as the construction of the insulator pins and the means for retaining them in position, are not limited to use on a crossarm in which the pins are arranged above and below same, as it is immaterial so far as these features are concerned whether one or more pins are used or whether the pin proj ects upwardly or downwardly from the cross-arm on which it is mounted.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. An insulator-supporting means consisting of a member provided with horizontally disposed flanges, an insulator pin passing through said flanges and projecting from said member, a second insulator pin passing through one of the flanges at a point out of Vertical alinement with the pin first referred to and projecting in an opposite direction from said member, and means for connecting said pins together.

2. An insulator-supporting means consisting of a member provided with horizontally disposed flanges, an insulator pin passing through said flanges and projecting from said member, a second insulator pin passing through one of the flanges and projecting in an opposite direction from said member, means for connecting said pins together, and an insulator-supporting arm on one of said pins that is arranged out of alinement with the other pin.

3. An insulator-supporting means consisting of a member provided with horizontally disposed flanges, an insulator pin mounted in said flanges and projecting in one direction from said member, a second insulator pin mounted in one of said flanges and arranged out of alinement with the insulator pin first referred to, and a laterally projecting extension on one of said pins that is connected to the other pin.

4-. An insulator-supporting means consisting of a member provided with horizontally disposed flanges, an insulator pin mounted in said flanges and projecting in one direction from said member, a second insulator pin mounted in one of said flanges and arranged out of alinement with the insulator provided with a laterally projecting arm through which said first-mentioned pin passes, and an insulator-supporting arm on said second pin.

6. An insulatonsupporting means consisting of a member provided with horizontally disposed flanges, an insulator pin passing through said flanges and projecting upwardly from said member, said pin having a screw-threaded portion, a second insulator pin projecting downwardly from said memher and passing through one of the flanges thereon, a laterally projecting extension on said lower pin having a screw-threaded opening for receiving the screw-threaded portion on said upper pin, and a laterally projecting insulator-supporting arm on said lower pin.

7. An insulator-supporting means consisting of a member provided with horizontally disposed top and bottom flanges, insulator pins passing through said flanges and pro jecting upwardly from said member, insulator pins projecting downwardly from said member through the bottom flange thereof, and arranged in staggered relation to said upper pins, and laterally projecting extensions on said lower pins arranged above said bottom flange and having threaded openings which receive said upper pins.

8. An insulator-supporting means consisting of a member provided with horizontally disposed top and bottom flanges, insulator pins passing through said flanges and projecting upwardly from said member, insulator pins projecting downwardly from said member through the bottom flange thereof and arranged in staggered relation to said upper pins, laterally projecting extensions on said lower pins arranged above said bottom flange and having threaded openings which receive said upper pins, nuts mounted on the lower ends of said upper pins below said bottom flange, and laterally projecting insulator-supporting arms on said lower pins. 7

In testimony whereof I hereunto affix my signature in the presence of two witnesses, this twenty second day of May 1911.

CHARLES G. ETTE.

Witnesses:

EDW. SOHWIDDE, WALTER G. RAITHEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. 

